[Suggestion] Image improvements

[Hexicube]

1. An option to mark an image as hidden
Would be useful for images intended to be used as the preview in lists, as well as for #3 below.

2. An option to mark an image as pixel-perfect (or non-scaling)
Would make smaller images look far better, as the scaling can often completely ruin an image.

3. Some way to embed images into the description
Would be useful for explaining specific parts of a mod with both text an images, similar to a post on this forum.